wpa_supplicant/sme.c

   1 /*
   2  * wpa_supplicant - SME
   3  * Copyright (c) 2009-2014, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "utils/eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/ieee802_11_common.h"
  15 #include "eapol_supp/eapol_supp_sm.h"
  16 #include "common/wpa_common.h"
  17 #include "common/sae.h"
  18 #include "rsn_supp/wpa.h"
  19 #include "rsn_supp/pmksa_cache.h"
  20 #include "config.h"
  21 #include "wpa_supplicant_i.h"
  22 #include "driver_i.h"
  23 #include "wpas_glue.h"
  24 #include "wps_supplicant.h"
  25 #include "p2p_supplicant.h"
  26 #include "notify.h"
  27 #include "bss.h"
  28 #include "scan.h"
  29 #include "sme.h"
  30 #include "hs20_supplicant.h"
  31
  32 #define SME_AUTH_TIMEOUT 5
  33 #define SME_ASSOC_TIMEOUT 5
  34
  35 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
  36 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
  37 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  38 #ifdef CONFIG_IEEE80211W
  39 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
  40 #endif /* CONFIG_IEEE80211W */
  41
  42
  43 #ifdef CONFIG_SAE
  44
  45 static int index_within_array(const int *array, int idx)
  46 {
  47         int i;
  48         for (i = 0; i < idx; i++) {
  49                 if (array[i] <= 0)
  50                         return 0;
  51         }
  52         return 1;
  53 }
  54
  55
  56 static int sme_set_sae_group(struct wpa_supplicant *wpa_s)
  57 {
  58         int *groups = wpa_s->conf->sae_groups;
  59         int default_groups[] = { 19, 20, 21, 25, 26, 0 };
  60
  61         if (!groups || groups[0] <= 0)
  62                 groups = default_groups;
  63
  64         /* Configuration may have changed, so validate current index */
  65         if (!index_within_array(groups, wpa_s->sme.sae_group_index))
  66                 return -1;
  67
  68         for (;;) {
  69                 int group = groups[wpa_s->sme.sae_group_index];
  70                 if (group < 0)
  71                         break;
  72                 if (sae_set_group(&wpa_s->sme.sae, group) == 0) {
  73                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d",
  74                                 wpa_s->sme.sae.group);
  75                        return 0;
  76                 }
  77                 wpa_s->sme.sae_group_index++;
  78         }
  79
  80         return -1;
  81 }
  82
  83
  84 static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
  85                                                  struct wpa_ssid *ssid,
  86                                                  const u8 *bssid)
  87 {
  88         struct wpabuf *buf;
  89         size_t len;
  90
  91         if (ssid->passphrase == NULL) {
  92                 wpa_printf(MSG_DEBUG, "SAE: No password available");
  93                 return NULL;
  94         }
  95
  96         if (sme_set_sae_group(wpa_s) < 0) {
  97                 wpa_printf(MSG_DEBUG, "SAE: Failed to select group");
  98                 return NULL;
  99         }
 100
 101         if (sae_prepare_commit(wpa_s->own_addr, bssid,
 102                                (u8 *) ssid->passphrase,
 103                                os_strlen(ssid->passphrase),
 104                                &wpa_s->sme.sae) < 0) {
 105                 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
 106                 return NULL;
 107         }
 108
 109         len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0;
 110         buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
 111         if (buf == NULL)
 112                 return NULL;
 113
 114         wpabuf_put_le16(buf, 1); /* Transaction seq# */
 115         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
 116         sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token);
 117
 118         return buf;
 119 }
 120
 121
 122 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
 123 {
 124         struct wpabuf *buf;
 125
 126         buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
 127         if (buf == NULL)
 128                 return NULL;
 129
 130         wpabuf_put_le16(buf, 2); /* Transaction seq# */
 131         wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
 132         sae_write_confirm(&wpa_s->sme.sae, buf);
 133
 134         return buf;
 135 }
 136
 137 #endif /* CONFIG_SAE */
 138
 139
 140 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
 141                                     struct wpa_bss *bss, struct wpa_ssid *ssid,
 142                                     int start)
 143 {
 144         struct wpa_driver_auth_params params;
 145         struct wpa_ssid *old_ssid;
 146 #ifdef CONFIG_IEEE80211R
 147         const u8 *ie;
 148 #endif /* CONFIG_IEEE80211R */
 149 #ifdef CONFIG_IEEE80211R
 150         const u8 *md = NULL;
 151 #endif /* CONFIG_IEEE80211R */
 152         int i, bssid_changed;
 153         struct wpabuf *resp = NULL;
 154         u8 ext_capab[18];
 155         int ext_capab_len;
 156
 157         if (bss == NULL) {
 158                 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
 159                         "the network");
 160                 wpas_connect_work_done(wpa_s);
 161                 return;
 162         }
 163
 164         wpa_s->current_bss = bss;
 165
 166         os_memset(&params, 0, sizeof(params));
 167         wpa_s->reassociate = 0;
 168
 169         params.freq = bss->freq;
 170         params.bssid = bss->bssid;
 171         params.ssid = bss->ssid;
 172         params.ssid_len = bss->ssid_len;
 173         params.p2p = ssid->p2p_group;
 174
 175         if (wpa_s->sme.ssid_len != params.ssid_len ||
 176             os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
 177                 wpa_s->sme.prev_bssid_set = 0;
 178
 179         wpa_s->sme.freq = params.freq;
 180         os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
 181         wpa_s->sme.ssid_len = params.ssid_len;
 182
 183         params.auth_alg = WPA_AUTH_ALG_OPEN;
 184 #ifdef IEEE8021X_EAPOL
 185         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 186                 if (ssid->leap) {
 187                         if (ssid->non_leap == 0)
 188                                 params.auth_alg = WPA_AUTH_ALG_LEAP;
 189                         else
 190                                 params.auth_alg |= WPA_AUTH_ALG_LEAP;
 191                 }
 192         }
 193 #endif /* IEEE8021X_EAPOL */
 194         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
 195                 params.auth_alg);
 196         if (ssid->auth_alg) {
 197                 params.auth_alg = ssid->auth_alg;
 198                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
 199                         "0x%x", params.auth_alg);
 200         }
 201 #ifdef CONFIG_SAE
 202         wpa_s->sme.sae_pmksa_caching = 0;
 203         if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
 204                 const u8 *rsn;
 205                 struct wpa_ie_data ied;
 206
 207                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 208                 if (rsn &&
 209                     wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
 210                         if (wpa_key_mgmt_sae(ied.key_mgmt)) {
 211                                 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
 212                                 params.auth_alg = WPA_AUTH_ALG_SAE;
 213                         }
 214                 }
 215         }
 216 #endif /* CONFIG_SAE */
 217
 218         for (i = 0; i < NUM_WEP_KEYS; i++) {
 219                 if (ssid->wep_key_len[i])
 220                         params.wep_key[i] = ssid->wep_key[i];
 221                 params.wep_key_len[i] = ssid->wep_key_len[i];
 222         }
 223         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
 224
 225         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 226         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 227         os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 228         if (bssid_changed)
 229                 wpas_notify_bssid_changed(wpa_s);
 230
 231         if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 232              wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
 233             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 234                 int try_opportunistic;
 235                 try_opportunistic = (ssid->proactive_key_caching < 0 ?
 236                                      wpa_s->conf->okc :
 237                                      ssid->proactive_key_caching) &&
 238                         (ssid->proto & WPA_PROTO_RSN);
 239                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 240                                             wpa_s->current_ssid,
 241                                             try_opportunistic) == 0)
 242                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 243                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 244                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 245                                               wpa_s->sme.assoc_req_ie,
 246                                               &wpa_s->sme.assoc_req_ie_len)) {
 247                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 248                                 "key management and encryption suites");
 249                         wpas_connect_work_done(wpa_s);
 250                         return;
 251                 }
 252         } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 253                    wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
 254                 /*
 255                  * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
 256                  * use non-WPA since the scan results did not indicate that the
 257                  * AP is using WPA or WPA2.
 258                  */
 259                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 260                 wpa_s->sme.assoc_req_ie_len = 0;
 261         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 262                 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
 263                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 264                                               wpa_s->sme.assoc_req_ie,
 265                                               &wpa_s->sme.assoc_req_ie_len)) {
 266                         wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
 267                                 "key management and encryption suites (no "
 268                                 "scan results)");
 269                         wpas_connect_work_done(wpa_s);
 270                         return;
 271                 }
 272 #ifdef CONFIG_WPS
 273         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 274                 struct wpabuf *wps_ie;
 275                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
 276                 if (wps_ie && wpabuf_len(wps_ie) <=
 277                     sizeof(wpa_s->sme.assoc_req_ie)) {
 278                         wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
 279                         os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
 280                                   wpa_s->sme.assoc_req_ie_len);
 281                 } else
 282                         wpa_s->sme.assoc_req_ie_len = 0;
 283                 wpabuf_free(wps_ie);
 284                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 285 #endif /* CONFIG_WPS */
 286         } else {
 287                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 288                 wpa_s->sme.assoc_req_ie_len = 0;
 289         }
 290
 291 #ifdef CONFIG_IEEE80211R
 292         ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 293         if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 294                 md = ie + 2;
 295         wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
 296         if (md) {
 297                 /* Prepare for the next transition */
 298                 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
 299         }
 300
 301         if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
 302                 if (wpa_s->sme.assoc_req_ie_len + 5 <
 303                     sizeof(wpa_s->sme.assoc_req_ie)) {
 304                         struct rsn_mdie *mdie;
 305                         u8 *pos = wpa_s->sme.assoc_req_ie +
 306                                 wpa_s->sme.assoc_req_ie_len;
 307                         *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 308                         *pos++ = sizeof(*mdie);
 309                         mdie = (struct rsn_mdie *) pos;
 310                         os_memcpy(mdie->mobility_domain, md,
 311                                   MOBILITY_DOMAIN_ID_LEN);
 312                         mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
 313                         wpa_s->sme.assoc_req_ie_len += 5;
 314                 }
 315
 316                 if (wpa_s->sme.ft_used &&
 317                     os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
 318                     wpa_sm_has_ptk(wpa_s->wpa)) {
 319                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
 320                                 "over-the-air");
 321                         params.auth_alg = WPA_AUTH_ALG_FT;
 322                         params.ie = wpa_s->sme.ft_ies;
 323                         params.ie_len = wpa_s->sme.ft_ies_len;
 324                 }
 325         }
 326 #endif /* CONFIG_IEEE80211R */
 327
 328 #ifdef CONFIG_IEEE80211W
 329         wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
 330                 wpa_s->conf->pmf : ssid->ieee80211w;
 331         if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
 332                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 333                 struct wpa_ie_data _ie;
 334                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
 335                     _ie.capabilities &
 336                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
 337                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
 338                                 "MFP: require MFP");
 339                         wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
 340                 }
 341         }
 342 #endif /* CONFIG_IEEE80211W */
 343
 344 #ifdef CONFIG_P2P
 345         if (wpa_s->global->p2p) {
 346                 u8 *pos;
 347                 size_t len;
 348                 int res;
 349                 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
 350                 len = sizeof(wpa_s->sme.assoc_req_ie) -
 351                         wpa_s->sme.assoc_req_ie_len;
 352                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
 353                                             ssid->p2p_group);
 354                 if (res >= 0)
 355                         wpa_s->sme.assoc_req_ie_len += res;
 356         }
 357 #endif /* CONFIG_P2P */
 358
 359 #ifdef CONFIG_HS20
 360         if (is_hs20_network(wpa_s, ssid, bss)) {
 361                 struct wpabuf *hs20;
 362                 hs20 = wpabuf_alloc(20);
 363                 if (hs20) {
 364                         int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
 365                         size_t len;
 366
 367                         wpas_hs20_add_indication(hs20, pps_mo_id);
 368                         len = sizeof(wpa_s->sme.assoc_req_ie) -
 369                                 wpa_s->sme.assoc_req_ie_len;
 370                         if (wpabuf_len(hs20) <= len) {
 371                                 os_memcpy(wpa_s->sme.assoc_req_ie +
 372                                           wpa_s->sme.assoc_req_ie_len,
 373                                           wpabuf_head(hs20), wpabuf_len(hs20));
 374                                 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
 375                         }
 376                         wpabuf_free(hs20);
 377                 }
 378         }
 379 #endif /* CONFIG_HS20 */
 380
 381         ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
 382                                              sizeof(ext_capab));
 383         if (ext_capab_len > 0) {
 384                 u8 *pos = wpa_s->sme.assoc_req_ie;
 385                 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
 386                         pos += 2 + pos[1];
 387                 os_memmove(pos + ext_capab_len, pos,
 388                            wpa_s->sme.assoc_req_ie_len -
 389                            (pos - wpa_s->sme.assoc_req_ie));
 390                 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
 391                 os_memcpy(pos, ext_capab, ext_capab_len);
 392         }
 393
 394 #ifdef CONFIG_SAE
 395         if (params.auth_alg == WPA_AUTH_ALG_SAE &&
 396             pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0)
 397         {
 398                 wpa_dbg(wpa_s, MSG_DEBUG,
 399                         "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
 400                 params.auth_alg = WPA_AUTH_ALG_OPEN;
 401                 wpa_s->sme.sae_pmksa_caching = 1;
 402         }
 403
 404         if (params.auth_alg == WPA_AUTH_ALG_SAE) {
 405                 if (start)
 406                         resp = sme_auth_build_sae_commit(wpa_s, ssid,
 407                                                          bss->bssid);
 408                 else
 409                         resp = sme_auth_build_sae_confirm(wpa_s);
 410                 if (resp == NULL) {
 411                         wpas_connect_work_done(wpa_s);
 412                         return;
 413                 }
 414                 params.sae_data = wpabuf_head(resp);
 415                 params.sae_data_len = wpabuf_len(resp);
 416                 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
 417         }
 418 #endif /* CONFIG_SAE */
 419
 420         wpa_supplicant_cancel_sched_scan(wpa_s);
 421         wpa_supplicant_cancel_scan(wpa_s);
 422
 423         wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
 424                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 425                 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
 426
 427         wpa_clear_keys(wpa_s, bss->bssid);
 428         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
 429         old_ssid = wpa_s->current_ssid;
 430         wpa_s->current_ssid = ssid;
 431         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 432         wpa_supplicant_initiate_eapol(wpa_s);
 433         if (old_ssid != wpa_s->current_ssid)
 434                 wpas_notify_network_changed(wpa_s);
 435
 436 #ifdef CONFIG_P2P
 437         /*
 438          * If multi-channel concurrency is not supported, check for any
 439          * frequency conflict. In case of any frequency conflict, remove the
 440          * least prioritized connection.
 441          */
 442         if (wpa_s->num_multichan_concurrent < 2) {
 443                 int freq, num;
 444                 num = get_shared_radio_freqs(wpa_s, &freq, 1);
 445                 if (num > 0 && freq > 0 && freq != params.freq) {
 446                         wpa_printf(MSG_DEBUG,
 447                                    "Conflicting frequency found (%d != %d)",
 448                                    freq, params.freq);
 449                         if (wpas_p2p_handle_frequency_conflicts(wpa_s,
 450                                                                 params.freq,
 451                                                                 ssid) < 0) {
 452                                 wpas_connection_failed(wpa_s, bss->bssid);
 453                                 wpa_supplicant_mark_disassoc(wpa_s);
 454                                 wpabuf_free(resp);
 455                                 wpas_connect_work_done(wpa_s);
 456                                 return;
 457                         }
 458                 }
 459         }
 460 #endif /* CONFIG_P2P */
 461
 462         wpa_s->sme.auth_alg = params.auth_alg;
 463         if (wpa_drv_authenticate(wpa_s, &params) < 0) {
 464                 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
 465                         "driver failed");
 466                 wpas_connection_failed(wpa_s, bss->bssid);
 467                 wpa_supplicant_mark_disassoc(wpa_s);
 468                 wpabuf_free(resp);
 469                 wpas_connect_work_done(wpa_s);
 470                 return;
 471         }
 472
 473         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
 474                                NULL);
 475
 476         /*
 477          * Association will be started based on the authentication event from
 478          * the driver.
 479          */
 480
 481         wpabuf_free(resp);
 482 }
 483
 484
 485 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
 486 {
 487         struct wpa_connect_work *cwork = work->ctx;
 488         struct wpa_supplicant *wpa_s = work->wpa_s;
 489
 490         if (deinit) {
 491                 if (work->started)
 492                         wpa_s->connect_work = NULL;
 493
 494                 wpas_connect_work_free(cwork);
 495                 return;
 496         }
 497
 498         wpa_s->connect_work = work;
 499
 500         if (!wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) {
 501                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
 502                 wpas_connect_work_done(wpa_s);
 503                 return;
 504         }
 505
 506         sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
 507 }
 508
 509
 510 void sme_authenticate(struct wpa_supplicant *wpa_s,
 511                       struct wpa_bss *bss, struct wpa_ssid *ssid)
 512 {
 513         struct wpa_connect_work *cwork;
 514
 515         if (bss == NULL || ssid == NULL)
 516                 return;
 517         if (wpa_s->connect_work) {
 518                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
 519                 return;
 520         }
 521
 522         if (radio_work_pending(wpa_s, "sme-connect")) {
 523                 /*
 524                  * The previous sme-connect work might no longer be valid due to
 525                  * the fact that the BSS list was updated. In addition, it makes
 526                  * sense to adhere to the 'newer' decision.
 527                  */
 528                 wpa_dbg(wpa_s, MSG_DEBUG,
 529                         "SME: Remove previous pending sme-connect");
 530                 radio_remove_works(wpa_s, "sme-connect", 0);
 531         }
 532
 533         cwork = os_zalloc(sizeof(*cwork));
 534         if (cwork == NULL)
 535                 return;
 536         cwork->bss = bss;
 537         cwork->ssid = ssid;
 538         cwork->sme = 1;
 539
 540 #ifdef CONFIG_SAE
 541         wpa_s->sme.sae.state = SAE_NOTHING;
 542         wpa_s->sme.sae.send_confirm = 0;
 543         wpa_s->sme.sae_group_index = 0;
 544 #endif /* CONFIG_SAE */
 545
 546         if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
 547                            sme_auth_start_cb, cwork) < 0)
 548                 wpas_connect_work_free(cwork);
 549 }
 550
 551
 552 #ifdef CONFIG_SAE
 553
 554 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
 555                         u16 status_code, const u8 *data, size_t len)
 556 {
 557         wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
 558                 "status code %u", auth_transaction, status_code);
 559
 560         if (auth_transaction == 1 &&
 561             status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
 562             wpa_s->sme.sae.state == SAE_COMMITTED &&
 563             wpa_s->current_bss && wpa_s->current_ssid) {
 564                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
 565                         "requested");
 566                 wpabuf_free(wpa_s->sme.sae_token);
 567                 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
 568                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 569                                         wpa_s->current_ssid, 1);
 570                 return 0;
 571         }
 572
 573         if (auth_transaction == 1 &&
 574             status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
 575             wpa_s->sme.sae.state == SAE_COMMITTED &&
 576             wpa_s->current_bss && wpa_s->current_ssid) {
 577                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
 578                 wpa_s->sme.sae_group_index++;
 579                 if (sme_set_sae_group(wpa_s) < 0)
 580                         return -1; /* no other groups enabled */
 581                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
 582                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 583                                         wpa_s->current_ssid, 1);
 584                 return 0;
 585         }
 586
 587         if (status_code != WLAN_STATUS_SUCCESS)
 588                 return -1;
 589
 590         if (auth_transaction == 1) {
 591                 int *groups = wpa_s->conf->sae_groups;
 592
 593                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
 594                 if (wpa_s->current_bss == NULL ||
 595                     wpa_s->current_ssid == NULL)
 596                         return -1;
 597                 if (wpa_s->sme.sae.state != SAE_COMMITTED)
 598                         return -1;
 599                 if (groups && groups[0] <= 0)
 600                         groups = NULL;
 601                 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
 602                                      groups) != WLAN_STATUS_SUCCESS)
 603                         return -1;
 604
 605                 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
 606                         wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
 607                                    "commit");
 608                         return -1;
 609                 }
 610
 611                 wpabuf_free(wpa_s->sme.sae_token);
 612                 wpa_s->sme.sae_token = NULL;
 613                 sme_send_authentication(wpa_s, wpa_s->current_bss,
 614                                         wpa_s->current_ssid, 0);
 615                 return 0;
 616         } else if (auth_transaction == 2) {
 617                 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
 618                 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
 619                         return -1;
 620                 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
 621                         return -1;
 622                 wpa_s->sme.sae.state = SAE_ACCEPTED;
 623                 sae_clear_temp_data(&wpa_s->sme.sae);
 624                 return 1;
 625         }
 626
 627         return -1;
 628 }
 629 #endif /* CONFIG_SAE */
 630
 631
 632 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 633 {
 634         struct wpa_ssid *ssid = wpa_s->current_ssid;
 635
 636         if (ssid == NULL) {
 637                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 638                         "when network is not selected");
 639                 return;
 640         }
 641
 642         if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
 643                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
 644                         "when not in authenticating state");
 645                 return;
 646         }
 647
 648         if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
 649                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
 650                         "unexpected peer " MACSTR,
 651                         MAC2STR(data->auth.peer));
 652                 return;
 653         }
 654
 655         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
 656                 " auth_type=%d auth_transaction=%d status_code=%d",
 657                 MAC2STR(data->auth.peer), data->auth.auth_type,
 658                 data->auth.auth_transaction, data->auth.status_code);
 659         wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
 660                     data->auth.ies, data->auth.ies_len);
 661
 662         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 663
 664 #ifdef CONFIG_SAE
 665         if (data->auth.auth_type == WLAN_AUTH_SAE) {
 666                 int res;
 667                 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
 668                                    data->auth.status_code, data->auth.ies,
 669                                    data->auth.ies_len);
 670                 if (res < 0) {
 671                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 672                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 673
 674                 }
 675                 if (res != 1)
 676                         return;
 677
 678                 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
 679                            "4-way handshake");
 680                 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
 681                                wpa_s->pending_bssid);
 682         }
 683 #endif /* CONFIG_SAE */
 684
 685         if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 686                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
 687                         "code %d)", data->auth.status_code);
 688
 689                 if (data->auth.status_code !=
 690                     WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
 691                     wpa_s->sme.auth_alg == data->auth.auth_type ||
 692                     wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
 693                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 694                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 695                         return;
 696                 }
 697
 698                 wpas_connect_work_done(wpa_s);
 699
 700                 switch (data->auth.auth_type) {
 701                 case WLAN_AUTH_OPEN:
 702                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 703
 704                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
 705                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 706                                                  wpa_s->current_ssid);
 707                         return;
 708
 709                 case WLAN_AUTH_SHARED_KEY:
 710                         wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
 711
 712                         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
 713                         wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
 714                                                  wpa_s->current_ssid);
 715                         return;
 716
 717                 default:
 718                         return;
 719                 }
 720         }
 721
 722 #ifdef CONFIG_IEEE80211R
 723         if (data->auth.auth_type == WLAN_AUTH_FT) {
 724                 union wpa_event_data edata;
 725                 os_memset(&edata, 0, sizeof(edata));
 726                 edata.ft_ies.ies = data->auth.ies;
 727                 edata.ft_ies.ies_len = data->auth.ies_len;
 728                 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
 729                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
 730         }
 731 #endif /* CONFIG_IEEE80211R */
 732
 733         sme_associate(wpa_s, ssid->mode, data->auth.peer,
 734                       data->auth.auth_type);
 735 }
 736
 737
 738 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
 739                    const u8 *bssid, u16 auth_type)
 740 {
 741         struct wpa_driver_associate_params params;
 742         struct ieee802_11_elems elems;
 743 #ifdef CONFIG_HT_OVERRIDES
 744         struct ieee80211_ht_capabilities htcaps;
 745         struct ieee80211_ht_capabilities htcaps_mask;
 746 #endif /* CONFIG_HT_OVERRIDES */
 747 #ifdef CONFIG_VHT_OVERRIDES
 748         struct ieee80211_vht_capabilities vhtcaps;
 749         struct ieee80211_vht_capabilities vhtcaps_mask;
 750 #endif /* CONFIG_VHT_OVERRIDES */
 751
 752         os_memset(&params, 0, sizeof(params));
 753         params.bssid = bssid;
 754         params.ssid = wpa_s->sme.ssid;
 755         params.ssid_len = wpa_s->sme.ssid_len;
 756         params.freq.freq = wpa_s->sme.freq;
 757         params.bg_scan_period = wpa_s->current_ssid ?
 758                 wpa_s->current_ssid->bg_scan_period : -1;
 759         params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
 760                 wpa_s->sme.assoc_req_ie : NULL;
 761         params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
 762         params.pairwise_suite = wpa_s->pairwise_cipher;
 763         params.group_suite = wpa_s->group_cipher;
 764         params.key_mgmt_suite = wpa_s->key_mgmt;
 765         params.wpa_proto = wpa_s->wpa_proto;
 766 #ifdef CONFIG_HT_OVERRIDES
 767         os_memset(&htcaps, 0, sizeof(htcaps));
 768         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
 769         params.htcaps = (u8 *) &htcaps;
 770         params.htcaps_mask = (u8 *) &htcaps_mask;
 771         wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
 772 #endif /* CONFIG_HT_OVERRIDES */
 773 #ifdef CONFIG_VHT_OVERRIDES
 774         os_memset(&vhtcaps, 0, sizeof(vhtcaps));
 775         os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
 776         params.vhtcaps = &vhtcaps;
 777         params.vhtcaps_mask = &vhtcaps_mask;
 778         wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
 779 #endif /* CONFIG_VHT_OVERRIDES */
 780 #ifdef CONFIG_IEEE80211R
 781         if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
 782                 params.wpa_ie = wpa_s->sme.ft_ies;
 783                 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
 784         }
 785 #endif /* CONFIG_IEEE80211R */
 786         params.mode = mode;
 787         params.mgmt_frame_protection = wpa_s->sme.mfp;
 788         if (wpa_s->sme.prev_bssid_set)
 789                 params.prev_bssid = wpa_s->sme.prev_bssid;
 790
 791         wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 792                 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
 793                 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
 794                 params.freq.freq);
 795
 796         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
 797
 798         if (params.wpa_ie == NULL ||
 799             ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
 800             < 0) {
 801                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
 802                 os_memset(&elems, 0, sizeof(elems));
 803         }
 804         if (elems.rsn_ie) {
 805                 params.wpa_proto = WPA_PROTO_RSN;
 806                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
 807                                         elems.rsn_ie_len + 2);
 808         } else if (elems.wpa_ie) {
 809                 params.wpa_proto = WPA_PROTO_WPA;
 810                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
 811                                         elems.wpa_ie_len + 2);
 812         } else if (elems.osen) {
 813                 params.wpa_proto = WPA_PROTO_OSEN;
 814                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
 815                                         elems.osen_len + 2);
 816         } else
 817                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 818         if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
 819                 params.p2p = 1;
 820
 821         if (wpa_s->parent->set_sta_uapsd)
 822                 params.uapsd = wpa_s->parent->sta_uapsd;
 823         else
 824                 params.uapsd = -1;
 825
 826         if (wpa_drv_associate(wpa_s, &params) < 0) {
 827                 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
 828                         "driver failed");
 829                 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 830                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 831                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 832                 return;
 833         }
 834
 835         eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
 836                                NULL);
 837 }
 838
 839
 840 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
 841                       const u8 *ies, size_t ies_len)
 842 {
 843         if (md == NULL || ies == NULL) {
 844                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
 845                 os_free(wpa_s->sme.ft_ies);
 846                 wpa_s->sme.ft_ies = NULL;
 847                 wpa_s->sme.ft_ies_len = 0;
 848                 wpa_s->sme.ft_used = 0;
 849                 return 0;
 850         }
 851
 852         os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
 853         wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
 854         os_free(wpa_s->sme.ft_ies);
 855         wpa_s->sme.ft_ies = os_malloc(ies_len);
 856         if (wpa_s->sme.ft_ies == NULL)
 857                 return -1;
 858         os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
 859         wpa_s->sme.ft_ies_len = ies_len;
 860         return 0;
 861 }
 862
 863
 864 static void sme_deauth(struct wpa_supplicant *wpa_s)
 865 {
 866         int bssid_changed;
 867
 868         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 869
 870         if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 871                                    WLAN_REASON_DEAUTH_LEAVING) < 0) {
 872                 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
 873                         "failed");
 874         }
 875         wpa_s->sme.prev_bssid_set = 0;
 876
 877         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 878         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 879         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 880         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 881         if (bssid_changed)
 882                 wpas_notify_bssid_changed(wpa_s);
 883 }
 884
 885
 886 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
 887                             union wpa_event_data *data)
 888 {
 889         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
 890                 "status code %d", MAC2STR(wpa_s->pending_bssid),
 891                 data->assoc_reject.status_code);
 892
 893         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 894
 895 #ifdef CONFIG_SAE
 896         if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
 897             wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
 898                 wpa_dbg(wpa_s, MSG_DEBUG,
 899                         "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
 900                 wpa_sm_aborted_cached(wpa_s->wpa);
 901                 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
 902                 if (wpa_s->current_bss) {
 903                         struct wpa_bss *bss = wpa_s->current_bss;
 904                         struct wpa_ssid *ssid = wpa_s->current_ssid;
 905
 906                         wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
 907                                                WLAN_REASON_DEAUTH_LEAVING);
 908                         wpas_connect_work_done(wpa_s);
 909                         wpa_supplicant_mark_disassoc(wpa_s);
 910                         wpa_supplicant_connect(wpa_s, bss, ssid);
 911                         return;
 912                 }
 913         }
 914 #endif /* CONFIG_SAE */
 915
 916         /*
 917          * For now, unconditionally terminate the previous authentication. In
 918          * theory, this should not be needed, but mac80211 gets quite confused
 919          * if the authentication is left pending.. Some roaming cases might
 920          * benefit from using the previous authentication, so this could be
 921          * optimized in the future.
 922          */
 923         sme_deauth(wpa_s);
 924 }
 925
 926
 927 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
 928                               union wpa_event_data *data)
 929 {
 930         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
 931         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 932         wpa_supplicant_mark_disassoc(wpa_s);
 933 }
 934
 935
 936 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
 937                                union wpa_event_data *data)
 938 {
 939         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
 940         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
 941         wpa_supplicant_mark_disassoc(wpa_s);
 942 }
 943
 944
 945 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
 946                         struct disassoc_info *info)
 947 {
 948         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
 949         if (wpa_s->sme.prev_bssid_set) {
 950                 /*
 951                  * cfg80211/mac80211 can get into somewhat confused state if
 952                  * the AP only disassociates us and leaves us in authenticated
 953                  * state. For now, force the state to be cleared to avoid
 954                  * confusing errors if we try to associate with the AP again.
 955                  */
 956                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
 957                         "driver state");
 958                 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
 959                                        WLAN_REASON_DEAUTH_LEAVING);
 960         }
 961 }
 962
 963
 964 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
 965 {
 966         struct wpa_supplicant *wpa_s = eloop_ctx;
 967         if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
 968                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
 969                 sme_deauth(wpa_s);
 970         }
 971 }
 972
 973
 974 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
 975 {
 976         struct wpa_supplicant *wpa_s = eloop_ctx;
 977         if (wpa_s->wpa_state == WPA_ASSOCIATING) {
 978                 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
 979                 sme_deauth(wpa_s);
 980         }
 981 }
 982
 983
 984 void sme_state_changed(struct wpa_supplicant *wpa_s)
 985 {
 986         /* Make sure timers are cleaned up appropriately. */
 987         if (wpa_s->wpa_state != WPA_ASSOCIATING)
 988                 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
 989         if (wpa_s->wpa_state != WPA_AUTHENTICATING)
 990                 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
 991 }
 992
 993
 994 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
 995                                        const u8 *prev_pending_bssid)
 996 {
 997         /*
 998          * mac80211-workaround to force deauth on failed auth cmd,
 999          * requires us to remain in authenticating state to allow the
1000          * second authentication attempt to be continued properly.
1001          */
1002         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1003                 "to proceed after disconnection event");
1004         wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1005         os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1006
1007         /*
1008          * Re-arm authentication timer in case auth fails for whatever reason.
1009          */
1010         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1011         eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1012                                NULL);
1013 }
1014
1015
1016 void sme_deinit(struct wpa_supplicant *wpa_s)
1017 {
1018         os_free(wpa_s->sme.ft_ies);
1019         wpa_s->sme.ft_ies = NULL;
1020         wpa_s->sme.ft_ies_len = 0;
1021 #ifdef CONFIG_IEEE80211W
1022         sme_stop_sa_query(wpa_s);
1023 #endif /* CONFIG_IEEE80211W */
1024 #ifdef CONFIG_SAE
1025         wpabuf_free(wpa_s->sme.sae_token);
1026         wpa_s->sme.sae_token = NULL;
1027         sae_clear_data(&wpa_s->sme.sae);
1028 #endif /* CONFIG_SAE */
1029
1030         eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1031         eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1032         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1033 }
1034
1035
1036 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1037                                    const u8 *chan_list, u8 num_channels,
1038                                    u8 num_intol)
1039 {
1040         struct ieee80211_2040_bss_coex_ie *bc_ie;
1041         struct ieee80211_2040_intol_chan_report *ic_report;
1042         struct wpabuf *buf;
1043
1044         wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1045                    " (num_channels=%u num_intol=%u)",
1046                    MAC2STR(wpa_s->bssid), num_channels, num_intol);
1047         wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1048                     chan_list, num_channels);
1049
1050         buf = wpabuf_alloc(2 + /* action.category + action_code */
1051                            sizeof(struct ieee80211_2040_bss_coex_ie) +
1052                            sizeof(struct ieee80211_2040_intol_chan_report) +
1053                            num_channels);
1054         if (buf == NULL)
1055                 return;
1056
1057         wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1058         wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1059
1060         bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1061         bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1062         bc_ie->length = 1;
1063         if (num_intol)
1064                 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1065
1066         if (num_channels > 0) {
1067                 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1068                 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1069                 ic_report->length = num_channels + 1;
1070                 ic_report->op_class = 0;
1071                 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1072                           num_channels);
1073         }
1074
1075         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1076                                 wpa_s->own_addr, wpa_s->bssid,
1077                                 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1078                 wpa_msg(wpa_s, MSG_INFO,
1079                         "SME: Failed to send 20/40 BSS Coexistence frame");
1080         }
1081
1082         wpabuf_free(buf);
1083 }
1084
1085
1086 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1087 {
1088         struct wpa_bss *bss;
1089         const u8 *ie;
1090         u16 ht_cap;
1091         u8 chan_list[P2P_MAX_CHANNELS], channel;
1092         u8 num_channels = 0, num_intol = 0, i;
1093
1094         if (!wpa_s->sme.sched_obss_scan)
1095                 return 0;
1096
1097         wpa_s->sme.sched_obss_scan = 0;
1098         if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1099                 return 1;
1100
1101         /*
1102          * Check whether AP uses regulatory triplet or channel triplet in
1103          * country info. Right now the operating class of the BSS channel
1104          * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1105          * based on the assumption that operating class triplet is not used in
1106          * beacon frame. If the First Channel Number/Operating Extension
1107          * Identifier octet has a positive integer value of 201 or greater,
1108          * then its operating class triplet.
1109          *
1110          * TODO: If Supported Operating Classes element is present in beacon
1111          * frame, have to lookup operating class in Annex E and fill them in
1112          * 2040 coex frame.
1113          */
1114         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1115         if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1116                 return 1;
1117
1118         os_memset(chan_list, 0, sizeof(chan_list));
1119
1120         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1121                 /* Skip other band bss */
1122                 enum hostapd_hw_mode mode;
1123                 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1124                 if (mode != HOSTAPD_MODE_IEEE80211G &&
1125                     mode != HOSTAPD_MODE_IEEE80211B)
1126                         continue;
1127
1128                 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1129                 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1130                 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1131                            " freq=%u chan=%u ht_cap=0x%x",
1132                            MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1133
1134                 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1135                         if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1136                                 num_intol++;
1137
1138                         /* Check whether the channel is already considered */
1139                         for (i = 0; i < num_channels; i++) {
1140                                 if (channel == chan_list[i])
1141                                         break;
1142                         }
1143                         if (i != num_channels)
1144                                 continue;
1145
1146                         chan_list[num_channels++] = channel;
1147                 }
1148         }
1149
1150         sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1151         return 1;
1152 }
1153
1154
1155 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1156                                           u16 num_modes,
1157                                           enum hostapd_hw_mode mode)
1158 {
1159         u16 i;
1160
1161         for (i = 0; i < num_modes; i++) {
1162                 if (modes[i].mode == mode)
1163                         return &modes[i];
1164         }
1165
1166         return NULL;
1167 }
1168
1169
1170 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
1171                                         enum hostapd_hw_mode band,
1172                                         struct wpa_driver_scan_params *params)
1173 {
1174         /* Include only supported channels for the specified band */
1175         struct hostapd_hw_modes *mode;
1176         int count, i;
1177
1178         mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
1179         if (mode == NULL) {
1180                 /* No channels supported in this band - use empty list */
1181                 params->freqs = os_zalloc(sizeof(int));
1182                 return;
1183         }
1184
1185         params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1186         if (params->freqs == NULL)
1187                 return;
1188         for (count = 0, i = 0; i < mode->num_channels; i++) {
1189                 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1190                         continue;
1191                 params->freqs[count++] = mode->channels[i].freq;
1192         }
1193 }
1194
1195
1196 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1197 {
1198         struct wpa_supplicant *wpa_s = eloop_ctx;
1199         struct wpa_driver_scan_params params;
1200
1201         if (!wpa_s->current_bss) {
1202                 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1203                 return;
1204         }
1205
1206         os_memset(&params, 0, sizeof(params));
1207         wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1208         params.low_priority = 1;
1209         wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1210
1211         if (wpa_supplicant_trigger_scan(wpa_s, &params))
1212                 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1213         else
1214                 wpa_s->sme.sched_obss_scan = 1;
1215         os_free(params.freqs);
1216
1217         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1218                                sme_obss_scan_timeout, wpa_s, NULL);
1219 }
1220
1221
1222 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1223 {
1224         const u8 *ie;
1225         struct wpa_bss *bss = wpa_s->current_bss;
1226         struct wpa_ssid *ssid = wpa_s->current_ssid;
1227         struct hostapd_hw_modes *hw_mode = NULL;
1228         int i;
1229
1230         eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1231         wpa_s->sme.sched_obss_scan = 0;
1232         if (!enable)
1233                 return;
1234
1235         /*
1236          * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1237          * or it expects OBSS scan to be performed by wpa_supplicant.
1238          */
1239         if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1240               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1241             ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1242                 return;
1243
1244         if (!wpa_s->hw.modes)
1245                 return;
1246
1247         /* only HT caps in 11g mode are relevant */
1248         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1249                 hw_mode = &wpa_s->hw.modes[i];
1250                 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1251                         break;
1252         }
1253
1254         /* Driver does not support HT40 for 11g or doesn't have 11g. */
1255         if (i == wpa_s->hw.num_modes || !hw_mode ||
1256             !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1257                 return;
1258
1259         if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1260                 return; /* Not associated on 2.4 GHz band */
1261
1262         /* Check whether AP supports HT40 */
1263         ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1264         if (!ie || ie[1] < 2 ||
1265             !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1266                 return; /* AP does not support HT40 */
1267
1268         ie = wpa_bss_get_ie(wpa_s->current_bss,
1269                             WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1270         if (!ie || ie[1] < 14)
1271                 return; /* AP does not request OBSS scans */
1272
1273         wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1274         if (wpa_s->sme.obss_scan_int < 10) {
1275                 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1276                            "replaced with the minimum 10 sec",
1277                            wpa_s->sme.obss_scan_int);
1278                 wpa_s->sme.obss_scan_int = 10;
1279         }
1280         wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1281                    wpa_s->sme.obss_scan_int);
1282         eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1283                                sme_obss_scan_timeout, wpa_s, NULL);
1284 }
1285
1286
1287 #ifdef CONFIG_IEEE80211W
1288
1289 static const unsigned int sa_query_max_timeout = 1000;
1290 static const unsigned int sa_query_retry_timeout = 201;
1291
1292 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1293 {
1294         u32 tu;
1295         struct os_reltime now, passed;
1296         os_get_reltime(&now);
1297         os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1298         tu = (passed.sec * 1000000 + passed.usec) / 1024;
1299         if (sa_query_max_timeout < tu) {
1300                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1301                 sme_stop_sa_query(wpa_s);
1302                 wpa_supplicant_deauthenticate(
1303                         wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1304                 return 1;
1305         }
1306
1307         return 0;
1308 }
1309
1310
1311 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1312                                   const u8 *trans_id)
1313 {
1314         u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1315         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1316                 MACSTR, MAC2STR(wpa_s->bssid));
1317         wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1318                     trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1319         req[0] = WLAN_ACTION_SA_QUERY;
1320         req[1] = WLAN_SA_QUERY_REQUEST;
1321         os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1322         if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1323                                 wpa_s->own_addr, wpa_s->bssid,
1324                                 req, sizeof(req), 0) < 0)
1325                 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1326                         "Request");
1327 }
1328
1329
1330 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1331 {
1332         struct wpa_supplicant *wpa_s = eloop_ctx;
1333         unsigned int timeout, sec, usec;
1334         u8 *trans_id, *nbuf;
1335
1336         if (wpa_s->sme.sa_query_count > 0 &&
1337             sme_check_sa_query_timeout(wpa_s))
1338                 return;
1339
1340         nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1341                                 wpa_s->sme.sa_query_count + 1,
1342                                 WLAN_SA_QUERY_TR_ID_LEN);
1343         if (nbuf == NULL)
1344                 return;
1345         if (wpa_s->sme.sa_query_count == 0) {
1346                 /* Starting a new SA Query procedure */
1347                 os_get_reltime(&wpa_s->sme.sa_query_start);
1348         }
1349         trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1350         wpa_s->sme.sa_query_trans_id = nbuf;
1351         wpa_s->sme.sa_query_count++;
1352
1353         if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1354                 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1355                 return;
1356         }
1357
1358         timeout = sa_query_retry_timeout;
1359         sec = ((timeout / 1000) * 1024) / 1000;
1360         usec = (timeout % 1000) * 1024;
1361         eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1362
1363         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1364                 wpa_s->sme.sa_query_count);
1365
1366         sme_send_sa_query_req(wpa_s, trans_id);
1367 }
1368
1369
1370 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1371 {
1372         sme_sa_query_timer(wpa_s, NULL);
1373 }
1374
1375
1376 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1377 {
1378         eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1379         os_free(wpa_s->sme.sa_query_trans_id);
1380         wpa_s->sme.sa_query_trans_id = NULL;
1381         wpa_s->sme.sa_query_count = 0;
1382 }
1383
1384
1385 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1386                                  const u8 *da, u16 reason_code)
1387 {
1388         struct wpa_ssid *ssid;
1389         struct os_reltime now;
1390
1391         if (wpa_s->wpa_state != WPA_COMPLETED)
1392                 return;
1393         ssid = wpa_s->current_ssid;
1394         if (ssid == NULL ||
1395             (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1396              wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1397                 return;
1398         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1399                 return;
1400         if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1401             reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1402                 return;
1403         if (wpa_s->sme.sa_query_count > 0)
1404                 return;
1405
1406         os_get_reltime(&now);
1407         if (wpa_s->sme.last_unprot_disconnect.sec &&
1408             !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1409                 return; /* limit SA Query procedure frequency */
1410         wpa_s->sme.last_unprot_disconnect = now;
1411
1412         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1413                 "possible AP/STA state mismatch - trigger SA Query");
1414         sme_start_sa_query(wpa_s);
1415 }
1416
1417
1418 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1419                      const u8 *data, size_t len)
1420 {
1421         int i;
1422
1423         if (wpa_s->sme.sa_query_trans_id == NULL ||
1424             len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1425             data[0] != WLAN_SA_QUERY_RESPONSE)
1426                 return;
1427         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1428                 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1429
1430         if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1431                 return;
1432
1433         for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1434                 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1435                               i * WLAN_SA_QUERY_TR_ID_LEN,
1436                               data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1437                         break;
1438         }
1439
1440         if (i >= wpa_s->sme.sa_query_count) {
1441                 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1442                         "transaction identifier found");
1443                 return;
1444         }
1445
1446         wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1447                 "from " MACSTR, MAC2STR(sa));
1448         sme_stop_sa_query(wpa_s);
1449 }
1450
1451 #endif /* CONFIG_IEEE80211W */